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C21 Non-Billable Code

Malignant neoplasm of anus and anal canal

Chapter Classification

Chapter 2 Neoplasms (C00-D49)

Section Detail

C15-C26 Malignant neoplasms of digestive organs (C15-C26)

Coding Guidelines & Notes

excludes2
  • malignant carcinoid tumors of the colon (C7A.02-)
  • malignant melanoma of anal margin (C43.51)
  • malignant melanoma of anal skin (C43.51)
  • malignant melanoma of perianal skin (C43.51)
  • other and unspecified malignant neoplasm of anal margin (C44.500, C44.510, C44.520, C44.590)
  • other and unspecified malignant neoplasm of anal skin (C44.500, C44.510, C44.520, C44.590)
  • other and unspecified malignant neoplasm of perianal skin (C44.500, C44.510, C44.520, C44.590)

More Specific Diagnosis Codes

This code is not billable as it requires a higher level of specificity. Select a more specific code below.

  • C21.0 - Malignant neoplasm of anus, unspecified Billable
  • C21.1 - Malignant neoplasm of anal canal Billable
  • C21.2 - Malignant neoplasm of cloacogenic zone Billable
  • C21.8 - Malignant neoplasm of overlapping sites of rectum, anus and anal canal Billable

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